Time to send in Steve McQueen.
Let’s say Cal said it was leaving. Do you think DJT would send in troops to stop it?? Actually I do because while it would pain him to do so, once something like that happens to a country it would continue until there were few states under the same flag. IMO, this is why sanctuary cities and the like should never have been allowed to do what they have been doing. The first one should have been suppressed. Now we have 20 or more cities deciding on their own immigration policy.
We have major military facilities in California don’t forget.
More likely would be a going away party, and “Don’t call us, we’ll call you.”